package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    @Override
    public void categoryEdit(CategoryDTO dto) {
        Category category = new Category();
        BeanUtils.copyProperties(dto, category);
        categoryMapper.categoryUpdate(category);
    }

    @Override
    public PageResult categoryPageQuery(CategoryPageQueryDTO dto) {
        PageHelper.startPage(dto.getPage(), dto.getPageSize());
        Page<Category> page = categoryMapper.pageQuery(dto);
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    public void categoryStatusChange(Long id, Integer status) {
        Category category = Category.builder()
                .id(id)
                .status(status)
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())
                .build();
        categoryMapper.categoryUpdate(category);
    }

    @Override
    public void categoryAdd(CategoryDTO dto) {
        Category category = new Category();
        BeanUtils.copyProperties(dto, category);
        category.setStatus(StatusConstant.DISABLE);
        categoryMapper.categoryAdd(category);
    }

    @Override
    public void deleteById(Long id) {
        if (dishMapper.countByCategoryId(id) > 0) {
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        Integer count = setmealMapper.countByCategoryId(id);
        if (count > 0) {
            //当前套餐下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        categoryMapper.deleteById(id);
    }

    @Override
    public List<Category> listByType(Integer type) {
        return categoryMapper.listByType(type);
    }
}
